Tanya Marshall

Princeton Presidential Fellow
15 Guyot Hall

Research Summary: Tanya’s research explores nutrient supply and biogeochemical cycling in the modern ocean using geochemical tracers like nitrate isotopes and nutrient stoichiometry. Her Ph.D. (2023) focussed on characterising nitrogen cycling in the understudied South Atlantic and South Indian Oceans, and how local and remote processes occurring over multiple spatial scales impact surface ocean fertility, and carbon export potential. During her fellowship, Tanya will explore new quantitative methods for interpreting the rapidly expanding nitrogen isotope database with implications for better understanding pathways of nutrient transport and modification.

Key words: ocean biogeochemistry, nitrogen cycling, nitrate isotope ratios, ocean fertility